I know this is WAY off-topic, but I am curious as to what folks think about the level of cross-posting here and on email lists that are somewhat more specific; I suspect many of us follow both. I have seen several questions that are asked (in some cases nearly verbatim) on Biostar and on an email list. In some cases, the email list has already answered the question. Is there any guidance about the correct way to respond to such queries here? Is a link to an email response to the question considered rude?